检索结果-南通市图书馆

Initial-State Radiation in Inclusive Photon Spectroscopy from Electron-Positron Annihilation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1993年第6期10卷 325-328页

作者： gu Yifan Institute of High Energy Physics Academia SinicaBeijing 100039

We demonstrate that the effect of the initial-state radiation can be observed in the inclusive photon spectrum from electron-positron annihilation by careful analysis of the data collected in a detector optimized for high resolution measurement of *** present the first example of a photon line from radiative corrections of the j/ψ,resonance at total center-of-mass energy far above its *** also discuss potential applications of such effect in future electron-positron experiments.

关键词： positron correction annihilation

Construction of novel g-C_(3)N_(4)/β-FeOOH Z-Scheme heterostructure photocatalyst modified with carbon quantum dots for efficient degradation of RhB

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第14期181卷 11-19页

作者： juhua Luo Xing Liu jieliang gu Wenjie Zhao Minming gu Yu Xie School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China College of Environment and Chemical Engineering Nanchang Hangkong UniversityNanchang 330063China

The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very ***,in order to obtain efficient visible-light photocatalysts,g-C_(3)N_(4)/β-FeOOH-modified carbon quantum dots(CDs)composite photocat-alysts with Z-Scheme charge transfer mechanism were successfully *** phase composition and morphology of the composite were characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectrophotometry(FT-IR),and X-ray photoelectron spectroscopy(XPS)*** to the upconversion effect of the CDs,the optical response range of the composite was effectively widened,and the optical utilization rate was *** Z-Scheme heterostructure not only improves the light trapping ability,significantly inhibits charge-carrier complexation,and realizes the spatial separation of redox sites,but also ensures that the photocatalyst maintains a suitable valence-conductivity band position and maintains the strong redox *** addition,CDs have the unique characteristics of electronic storage and transfer,which effectively enhance the quantum separation efficiency of the *** photocatalytic efficiency was measured by degrading rhodamine B(RhB)under visible *** degradation performance was the best when the weight ratio of CDs was 6%,and the RhB solution degradation rate reached 100%in 60 *** unique structure and reliable mechanism provide a way for the development of advanced photocat-alyst.

关键词： Photocatalyst Degradation Visible light g-C_(3)N_(4) Carbon quantum dots

Solving surface plasmon resonances and near field in metallic nanostructures:green’s matrix method and its applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第24期55卷 2608-2617页

作者： gu Ying LI jia MARTIN Olivier j F gONg QiHuang State Key Laboratory for Mesoscopic Physics Department of Physics Peking University Beijing 100871 China Nanophotonics and Metrology Laboratory Swiss Federal Institute of Technology Lausanne (EPFL) CH-1015 Lausanne Switzerland

With the development of nanotechnology,many new optical phenomena in nanoscale have been *** the coupling of optical waves and collective oscillations of free electrons in metallic nanostructures,surface plasmon polaritons can be excited accompanying a strong near field enhancement that decays in a subwavelength scale,which have potential applications in the surface-enhanced Raman scattering,biosensor,optical communication,solar cells,and nonlinear optical frequency *** the present article,we review the green's matrix method for solving the surface plasmon resonances and near field in arbitrarily shaped nanostructures and in binary metallic *** this method,we design the plasmonic nanostructures whose resonances are tunable from the visible to near-infrared,study the interplay of plasmon resonances,and propose a new way to control plasmonic resonances in binary metallic nanostructures.

关键词：表面等离子体共振纳米结构二元金属矩阵方法近场应用表面增强拉曼散射表面等离子激元

Efficacy of Bunao Fuyuan decoction on cerebral ischemia and reperfusion injury in vitro

在线全文

学校读者我要写书评

暂无评论

journal of Traditional Chinese Medicine 2020年第5期40卷 758-765页

作者： gao Lei gu Weichao Department of Rehabilitation Medicine Huai'an Traditional Chinese Medicine Hospital Affiliated to Nanjing University of Chinese MedicineHuaian 223001China Department of Traditional Chinese Medicine The Affiliated Huai'an Hospital of Xuzhou Medical University and The Second People's Hospital of Huai'anHuaian 223002China

OBjECTIVE:To investigate the protective efficacy of Bunao Fuyuan decoction(BNFY)on cerebral Ischemia/reperfusion(I/R)***:The mouse PC12 cells were chosen,and the oxidative-glucose deprivation/re-oxygenation(OgD/R)injury model were established to simulate cerebral I/R *** was selected as a positive drug,and a gradient dose of BNFY was given for 6,12 and 24 h.3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide(MTT)assay were used to detect cell viability at each time *** apoptosis was measured by terminal deoxynucleotidyl transferase-mediated d UTP-botin nick end labeling(TUNEL)*** linked immunosorbent assay was used to detect the expression of tumor necrosis factor(TNF)-α,interleukin(IL)-6,IL-1βand platelet activating factor(PAF).Western blot assay were performed to detect the expression of key regulators[toll-like receptor 4(TLR4),nuclear factor kappa-B(NF-κB),p-p38 mito-gen-activated protein kinase(MAPK)and p-Akt(also known as protein kinase B,PKB)]of cell survival and inflammatory ***:The results of MTT assay and TUNEL staining assay revealed that BNFY significantly increased cell viability and inhibited cell apoptosis of PC12 cells following OgD/R,***,the expression of TNF-α,1 L-6,1 L-1βand PAF were decreased after BNFY *** the results of Western blot assay showed that BNFY downregulated TLR4,NF-κB,p-p38 MAPK expression and upregulated p-Akt ***:Our findings suggest that BNFY may play a role in protecting OgD/R injured PC12 cells through inhibiting the inflammatory response and cell apoptosis.

关键词： Inflammatory response Ischemic stroke PC12 Oxidative-glucose deprivation/re-oxygenation Bunao Fuyuan decoction

Fast magnetic energy dissipation in relativistic plasma induced by high order laser modes

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2016年第2期4卷 85-89页

作者： Y.j.gu Q.Yu O.Klimo T.Zh.Esirkepov S.V.Bulanov S.Weber g.Korn Institute of Physics of the ASCR Institute of Modern Physics Fudan University FNSPE Czech Technical University in Prague Kansai Photon Science Institute Japan Atomic Energy Agency

Fast magnetic field annihilation in a collisionless plasma is induced by using TEM(1,0) laser pulse. The magnetic quadrupole structure formation, expansion and annihilation stages are demonstrated with 2.5-dimensional particle-in-cell simulations. The magnetic field energy is converted to the electric field and accelerate the particles inside the annihilation plane. A bunch of high energy electrons moving backwards is detected in the current sheet. The strong displacement current is the dominant contribution which induces the longitudinal inductive electric field.

关键词： high order laser mode laser–plasma interaction magnetic annihilation

Biodegradable Materials and the Tissue Engineering of Nerves

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第12期7卷 1700-1703页

作者： Xiaosong gu Key Laboratory of Neuroregeneration of jiangsu and the Ministry of Education Co-Innovation Center of NeuroregenerationNantong UniversityNantong 226001China

*** Over the past 100 years,the development of biodegradable materials has helped to advance innovation in tissue-engineering technology by making such materials more feasible,resulting in technological breakthroughs and new clinical applications[1,2].Classical tissue-engineering theory involves three elements:biological materials,seed cells,and *** progress suggests that biodegradable materials with low immunogenicity,high biodegradability,good biocompatibility,and favorable regeneration microenvironments are of great significance[3].

关键词： breakthrough materials theory

Improving Link Prediction Accuracy of Network Embedding Algorithms via Rich Node Attribute Information

在线全文

学校读者我要写书评

暂无评论

journal of Social Computing 2023年第4期4卷 326-336页

作者： Weiwei gu jinqiang Hou Weiyi gu the College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China the School of Computing China University of GeosciencesWuhan 430074China.

Complex networks are widely used to represent an abundance of real-world relations ranging from social networks to brain networks. Inferring missing links or predicting future ones based on the currently observed network is known as the link prediction task. Recent network embedding based link prediction algorithms have demonstrated ground-breaking performance on link prediction accuracy. Those algorithms usually apply node attributes as the initial feature input to accelerate the convergence speed during the training process. However, they do not take full advantage of node feature information. In this paper, besides applying feature attributes as the initial input, we make better utilization of node attribute information by building attributable networks and plugging attributable networks into some typical link prediction algorithms and name this algorithm Attributive graph Enhanced Embedding (AgEE). AgEE is able to automatically learn the weighting trades-off between the structure and the attributive networks. Numerical experiments show that AgEE can improve the link prediction accuracy by around 3% compared with SEAL, Variational graph AutoEncoder (VgAE), and node2vec.

关键词： attributive network link prediction network embedding

Dedication to Clean Power and Promotion of the Energy Revolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering 2020年第12期6卷 1331-1332页

作者： Dazhao gu China Energy Investment Corporation Limited Beijing 100011China

The discovery and application of electric power triggered the second wave of industrialization and became one of three global technological revolutions since the 18th *** then,electrification has changed the livelihoods of *** power is also an important carrier of clean energy,where clean,low-carbon,and smart global electric power technologies have been developing *** power improves the standard of living of people worldwide and slows global *** rapid growth in renewable energies,the production of cleaner power has become a popular global trend.

关键词： Clean smart Revolution

Inspection of free energy functions in gradient crystal plasticity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2013年第6期29卷 763-772页

作者： Samuel Forest Nicolas guninchault Centre des Matriaux Mines ParisTechCNRS UMR 7633 BP 8791003 Evry CedexFrance

The dislocation density tensor computed as the cud of plastic distortion is regarded as a new constitutive variable in crystal plasticity. The dependence of the free energy function on the dislocation density tensor is explored starting from a quadratic ansatz. Rank one and logarithmic dependencies are then envisaged based on considerations from the statistical theory of dislocations. The rele- vance of the presented free energy potentials is evaluated from the corresponding analytical solutions of the periodic two-phase laminate problem under shear where one layer is a single crystal material undergoing single slip and the second one remains purely elastic.

关键词： gradient plasticity Crystal plasticity Continuum thermodynamics Dislocation density tensor Read- Shockley energy